Date: Thu, 23 Jun 2005 17:14:53 +0930 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: Peter Wemm <peter@wemm.org> Cc: arch@freebsd.org, Sue Howard <howardsue@gmail.com>, freebsd-arch@freebsd.org Subject: Re: Kernel Dump Message-ID: <20050623074453.GA71779@squash.dsto.defence.gov.au> In-Reply-To: <200506222323.26666.peter@wemm.org> References: <1e89cd51050616062241e9e201@mail.gmail.com> <200506222323.26666.peter@wemm.org>
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0n Wed, Jun 22, 2005 at 11:23:25PM -0700, Peter Wemm wrote:
>I've just rewritten the AMD64 crashdump support to use ELF like ia64.
>In fact, I reused most of the ia64 code. We ran into serious problems
>at work, first on the amd64 platform and now also the i386 platform.
>The problem is that x86 machines are increasinly having memory holes.
>The simplistic dump code has no way to skip the memory hole and tries
>to dump things like the AGP frame buffer, pci card MMIO space,
>PCI-Express configuration space (this means accessing hardware!!) and
>so on.
Curious, why is it that x86 creates memory holes in the first place ?
- aW
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